FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_tile.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 84 118 71.2%
Functions: 8 9 88.9%
Branches: 22 46 47.8%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Nicolas George
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * tile video filter
24 */
25
26 #include "libavutil/imgutils.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
29 #include "avfilter.h"
30 #include "drawutils.h"
31 #include "formats.h"
32 #include "video.h"
33 #include "internal.h"
34
35 typedef struct TileContext {
36 const AVClass *class;
37 unsigned w, h;
38 unsigned margin;
39 unsigned padding;
40 unsigned overlap;
41 unsigned init_padding;
42 unsigned current;
43 unsigned nb_frames;
44 FFDrawContext draw;
45 FFDrawColor blank;
46 AVFrame *out_ref;
47 AVFrame *prev_out_ref;
48 uint8_t rgba_color[4];
49 } TileContext;
50
51 #define OFFSET(x) offsetof(TileContext, x)
52 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
53
54 static const AVOption tile_options[] = {
55 { "layout", "set grid size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,
56 {.str = "6x5"}, 0, 0, FLAGS },
57 { "nb_frames", "set maximum number of frame to render", OFFSET(nb_frames),
58 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
59 { "margin", "set outer border margin in pixels", OFFSET(margin),
60 AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
61 { "padding", "set inner border thickness in pixels", OFFSET(padding),
62 AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
63 { "color", "set the color of the unused area", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
64 { "overlap", "set how many frames to overlap for each render", OFFSET(overlap),
65 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
66 { "init_padding", "set how many frames to initially pad", OFFSET(init_padding),
67 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
68 { NULL }
69 };
70
71 AVFILTER_DEFINE_CLASS(tile);
72
73 1 static av_cold int init(AVFilterContext *ctx)
74 {
75 1 TileContext *tile = ctx->priv;
76
77
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1 if (tile->w > UINT_MAX / tile->h) {
78 av_log(ctx, AV_LOG_ERROR, "Tile size %ux%u is insane.\n",
79 tile->w, tile->h);
80 return AVERROR(EINVAL);
81 }
82
83
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1 if (tile->padding) {
84
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1 if ((tile->w - 1 > (UINT32_MAX - 2 * tile->margin) / tile->padding) ||
85
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1 (tile->h - 1 > (UINT32_MAX - 2 * tile->margin) / tile->padding)) {
86 av_log(ctx, AV_LOG_ERROR, "Combination of Tile size %ux%u, padding %d and margin %d overflows.\n",
87 tile->w, tile->h, tile->padding, tile->margin);
88 return AVERROR(EINVAL);
89 }
90 }
91
92
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1 if (tile->nb_frames == 0) {
93 tile->nb_frames = tile->w * tile->h;
94
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1 } else if (tile->nb_frames > tile->w * tile->h) {
95 av_log(ctx, AV_LOG_ERROR, "nb_frames must be less than or equal to %dx%d=%d\n",
96 tile->w, tile->h, tile->w * tile->h);
97 return AVERROR(EINVAL);
98 }
99
100
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1 if (tile->overlap >= tile->nb_frames) {
101 av_log(ctx, AV_LOG_WARNING, "overlap must be less than %d\n", tile->nb_frames);
102 tile->overlap = tile->nb_frames - 1;
103 }
104
105
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1 if (tile->init_padding >= tile->nb_frames) {
106 av_log(ctx, AV_LOG_WARNING, "init_padding must be less than %d\n", tile->nb_frames);
107 } else {
108 1 tile->current = tile->init_padding;
109 }
110
111 1 return 0;
112 }
113
114 1 static int query_formats(AVFilterContext *ctx)
115 {
116 1 return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
117 }
118
119 1 static int config_props(AVFilterLink *outlink)
120 {
121 1 AVFilterContext *ctx = outlink->src;
122 1 TileContext *tile = ctx->priv;
123 1 AVFilterLink *inlink = ctx->inputs[0];
124 1 const unsigned total_margin_w = (tile->w - 1) * tile->padding + 2*tile->margin;
125 1 const unsigned total_margin_h = (tile->h - 1) * tile->padding + 2*tile->margin;
126
127
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1 if (inlink->w > (INT_MAX - total_margin_w) / tile->w) {
128 av_log(ctx, AV_LOG_ERROR, "Total width %ux%u is too much.\n",
129 tile->w, inlink->w);
130 return AVERROR(EINVAL);
131 }
132
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1 if (inlink->h > (INT_MAX - total_margin_h) / tile->h) {
133 av_log(ctx, AV_LOG_ERROR, "Total height %ux%u is too much.\n",
134 tile->h, inlink->h);
135 return AVERROR(EINVAL);
136 }
137 1 outlink->w = tile->w * inlink->w + total_margin_w;
138 1 outlink->h = tile->h * inlink->h + total_margin_h;
139 1 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
140 2 outlink->frame_rate = av_mul_q(inlink->frame_rate,
141 1 av_make_q(1, tile->nb_frames - tile->overlap));
142 1 ff_draw_init(&tile->draw, inlink->format, 0);
143 1 ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color);
144
145 1 return 0;
146 }
147
148 25 static void get_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y, unsigned current)
149 {
150 25 TileContext *tile = ctx->priv;
151 25 AVFilterLink *inlink = ctx->inputs[0];
152 25 const unsigned tx = current % tile->w;
153 25 const unsigned ty = current / tile->w;
154
155 25 *x = tile->margin + (inlink->w + tile->padding) * tx;
156 25 *y = tile->margin + (inlink->h + tile->padding) * ty;
157 25 }
158
159 static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf)
160 {
161 TileContext *tile = ctx->priv;
162 AVFilterLink *inlink = ctx->inputs[0];
163 unsigned x0, y0;
164
165 get_tile_pos(ctx, &x0, &y0, tile->current);
166 ff_fill_rectangle(&tile->draw, &tile->blank,
167 out_buf->data, out_buf->linesize,
168 x0, y0, inlink->w, inlink->h);
169 tile->current++;
170 }
171
172 5 static int end_last_frame(AVFilterContext *ctx)
173 {
174 5 TileContext *tile = ctx->priv;
175 5 AVFilterLink *outlink = ctx->outputs[0];
176 5 AVFrame *out_buf = tile->out_ref;
177 int ret;
178
179
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5 while (tile->current < tile->nb_frames)
180 draw_blank_frame(ctx, out_buf);
181 5 tile->current = tile->overlap;
182
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5 if (tile->current) {
183 av_frame_free(&tile->prev_out_ref);
184 tile->prev_out_ref = av_frame_clone(out_buf);
185 }
186 5 ret = ff_filter_frame(outlink, out_buf);
187 5 tile->out_ref = NULL;
188 5 return ret;
189 }
190
191 /* Note: direct rendering is not possible since there is no guarantee that
192 * buffers are fed to filter_frame in the order they were obtained from
193 * get_buffer (think B-frames). */
194
195 25 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
196 {
197 25 AVFilterContext *ctx = inlink->dst;
198 25 TileContext *tile = ctx->priv;
199 25 AVFilterLink *outlink = ctx->outputs[0];
200 unsigned x0, y0;
201
202
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25 if (!tile->out_ref) {
203 5 tile->out_ref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
204
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5 if (!tile->out_ref) {
205 av_frame_free(&picref);
206 return AVERROR(ENOMEM);
207 }
208 5 av_frame_copy_props(tile->out_ref, picref);
209 5 tile->out_ref->width = outlink->w;
210 5 tile->out_ref->height = outlink->h;
211
212 /* fill surface once for margin/padding */
213
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5 if (tile->margin || tile->padding || tile->init_padding)
214 5 ff_fill_rectangle(&tile->draw, &tile->blank,
215 5 tile->out_ref->data,
216 5 tile->out_ref->linesize,
217 0, 0, outlink->w, outlink->h);
218 5 tile->init_padding = 0;
219 }
220
221
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25 if (tile->prev_out_ref) {
222 unsigned x1, y1, i;
223
224 for (i = tile->nb_frames - tile->overlap; i < tile->nb_frames; i++) {
225 get_tile_pos(ctx, &x1, &y1, i);
226 get_tile_pos(ctx, &x0, &y0, i - (tile->nb_frames - tile->overlap));
227 ff_copy_rectangle2(&tile->draw,
228 tile->out_ref->data, tile->out_ref->linesize,
229 tile->prev_out_ref->data, tile->prev_out_ref->linesize,
230 x0, y0, x1, y1, inlink->w, inlink->h);
231
232 }
233 }
234
235 25 get_tile_pos(ctx, &x0, &y0, tile->current);
236 25 ff_copy_rectangle2(&tile->draw,
237 25 tile->out_ref->data, tile->out_ref->linesize,
238 25 picref->data, picref->linesize,
239 x0, y0, 0, 0, inlink->w, inlink->h);
240
241 25 av_frame_free(&picref);
242
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25 if (++tile->current == tile->nb_frames)
243 5 return end_last_frame(ctx);
244
245 20 return 0;
246 }
247
248 25 static int request_frame(AVFilterLink *outlink)
249 {
250 25 AVFilterContext *ctx = outlink->src;
251 25 TileContext *tile = ctx->priv;
252 25 AVFilterLink *inlink = ctx->inputs[0];
253 int r;
254
255 25 r = ff_request_frame(inlink);
256
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25 if (r == AVERROR_EOF && tile->current && tile->out_ref)
257 r = end_last_frame(ctx);
258 25 return r;
259 }
260
261 1 static av_cold void uninit(AVFilterContext *ctx)
262 {
263 1 TileContext *tile = ctx->priv;
264
265 1 av_frame_free(&tile->out_ref);
266 1 av_frame_free(&tile->prev_out_ref);
267 1 }
268
269 static const AVFilterPad tile_inputs[] = {
270 {
271 .name = "default",
272 .type = AVMEDIA_TYPE_VIDEO,
273 .filter_frame = filter_frame,
274 },
275 };
276
277 static const AVFilterPad tile_outputs[] = {
278 {
279 .name = "default",
280 .type = AVMEDIA_TYPE_VIDEO,
281 .config_props = config_props,
282 .request_frame = request_frame,
283 },
284 };
285
286 const AVFilter ff_vf_tile = {
287 .name = "tile",
288 .description = NULL_IF_CONFIG_SMALL("Tile several successive frames together."),
289 .init = init,
290 .uninit = uninit,
291 .priv_size = sizeof(TileContext),
292 FILTER_INPUTS(tile_inputs),
293 FILTER_OUTPUTS(tile_outputs),
294 FILTER_QUERY_FUNC(query_formats),
295 .priv_class = &tile_class,
296 };
297